Your teacher gives you a black powder. when you dissolve the powder in water, you see red particles that float to the top, black particles that sink to the bottom, and a green liquid.
what was the black powder?
compound
element
pure substance
mixture

Answer : The correct option is, mixture

Explanation :

Mixture : It is defined as the substance that is made by the combination of two or more different components.

Pure substance : It is defined as a substance that is made by the combination of only one type of atom or only one type of molecule.

Compound : It is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass.

Element : It is a pure substance which is composed of atoms of similar elements.

According to the definition of mixture, black powder is a mixture because it is made by the combination of red particles that float to the top, black particles that sink to the bottom and a green color liquid.

Hence, the correct option is, mixture

its first and third is your answer i did the qustion the fourth isnt right